public StringPair generate( NameClass nc ) {
if( nc instanceof SimpleNameClass ) {
// 90% is SimpleNameClass. So this check makes
// the computation faster.
return new StringPair(
((SimpleNameClass)nc).namespaceURI,
((SimpleNameClass)nc).localName );
}
final String MAGIC = ".";
final Set possibleNames = new java.util.HashSet();
// collect possible names
nc.visit( new NameClassVisitor(){
public Object onNsName( NamespaceNameClass nc ) {
possibleNames.add( new StringPair(nc.namespaceURI, MAGIC) );
return null;
}
public Object onSimple( SimpleNameClass nc ) {
possibleNames.add( new StringPair(nc.namespaceURI, nc.localName) );
return null;
}
public Object onAnyName( AnyNameClass nc ){
possibleNames.add( new StringPair(MAGIC, MAGIC) );
return null;
}
public Object onChoice( ChoiceNameClass nc ) {
nc.nc1.visit(this);
nc.nc2.visit(this);
return null;
}
public Object onNot( NotNameClass nc ) {
possibleNames.add( new StringPair(MAGIC, MAGIC) );
nc.child.visit(this);
return null;
}
public Object onDifference( DifferenceNameClass nc ) {
nc.nc1.visit(this);
nc.nc2.visit(this);
return null;
}
});
// remove failed items
Iterator itr = possibleNames.iterator();
while( itr.hasNext() ) {
StringPair p = (StringPair)itr.next();
if( !nc.accepts( p.namespaceURI, p.localName ) )
itr.remove();
}
if( possibleNames.size()==0 )
throw new Error("name class that accepts nothing");
// randomly pick one.
StringPair model = (StringPair)
possibleNames.toArray()[ random.nextInt(possibleNames.size()) ];
StringPair answer;
do {
// expand wild card
answer = new StringPair(
model.namespaceURI==MAGIC?getRandomURI():model.namespaceURI,
model.localName==MAGIC?getRandomName():model.localName );
}while( !nc.accepts(answer.namespaceURI,answer.localName) );
return answer;